Reconstructing solar magnetic fields from historical observations:VIII. AIA 1600 Å contrast as a proxy of solar magnetic fields

Autor: Tähtinen, I. (Ismo), Virtanen, I. (I.I.), Pevtsov, A. A. (Alexei A.), Mursula, K. (Kalevi)

Context: The bright regions in the solar chromosphere and temperature minimum have a good spatial correspondence with regions of intense photospheric magnetic field. Bright regions are visible in different emission lines and parts of the continuum. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2423::47307745b41368907f05349e04a2d7e4
http://urn.fi/urn:nbn:fi-fe2022102763381

The spectral impact of magnetic activity on disc-integrated HARPS-N solar observations: exploring new activity indicators

Autor: Giuseppina Micela, S. H. Saar, Ronald L. Walsworth, Rosario Cosentino, Annelies Mortier, David F. Phillips, A. Collier Cameron, Xavier Dumusque, Suzanne Aigrain, David W. Latham, Samantha Thompson, E. J. W. de Mooij, Raphaëlle D. Haywood, Ennio Poretti, T. W. Milbourne, Alessandro Sozzetti, M. López-Morales, Heather M. Cegla, Adriano Ghedina, David Charbonneau, A. Thompson, Emilio Molinari, J. Costes, Christopher A. Watson

Publikováno v: Monthly Notices of the Royal Astronomical Society
Thompson, A P G, Watson, C A, Haywood, R D, Costes, J C, de Mooij, E, Collier Cameron, A, Dumusque, X, Phillips, D F, Saar, S H, Mortier, A, Milbourne, T W, Aigrain, S, Cegla, H M, Charbonneau, D, Cosentino, R, Ghedina, A, Latham, D W, López-Morales, M, Micela, G, Molinari, E, Poretti, E, Sozzetti, A, Thompson, S & Walsworth, R 2020, ' The spectral impact of magnetic activity on disc-integrated HARPS-N solar observations: exploring new activity indicators ', Monthly Notices of the Royal Astronomical Society, vol. 494, no. 3, pp. 4279-4290 . https://doi.org/10.1093/mnras/staa1010

Stellar activity is the major roadblock on the path to finding true Earth-analogue planets with the Doppler technique. Thus, identifying new indicators that better trace magnetic activity (i.e. faculae and spots) is crucial to aid in disentangling th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35a695ac77547bd4eae151a9578fd1c6

HARPS-N solar RVs are dominated by large, bright magnetic regions

Autor: Giuseppina Micela, Rosario Cosentino, D. W. Latham, Adriano Ghedina, Heather M. Cegla, David F. Phillips, D. Charbonneau, Samantha Thompson, Steven H. Saar, Timothy Milbourne, C. H. Li, M. Lopez-Morales, Alessandro Sozzetti, C. Lovis, Andrew Szentgyorgyi, François Bouchy, Christopher A. Watson, M. Gonzalez, Stéphane Udry, Emilio Molinari, M. L. Palumbo, N. Buchschacher, Andrew Collier Cameron, Ken Rice, Jesus Maldonado, J. Costes, Francesco Pepe, Alex Glenday, Massimo Cecconi, L. Malavolta, Xavier Dumusque, Raphaëlle D. Haywood, D. Segransan, G. Piotto, M. Mayor, Annelies Mortier, Dimitar Sasselov, Nicholas Langellier, Ronald L. Walsworth, Marcello Lodi

Publikováno v: BASE-Bielefeld Academic Search Engine
Milbourne, T W, Haywood, R D, Phillips, D F, Saar, S H, Cegla, H M, Cameron, A C, Costes, J, Dumusque, X, Langellier, N, Latham, D W, Maldonado, J, Malavolta, L, Mortier, A, Palumbo, M L III, Thompson, S, Watson, C A, Bouchy, F, Buchschacher, N, Cecconi, M, Charbonneau, D, Cosentino, R, Ghedina, A, Glenday, A G, Gonzalez, M, Li, C-H, Lodi, M, López-Morales, M, Lovis, C, Mayor, M, Micela, G, Molinari, E, Pepe, F, Piotto, G, Rice, K, Sasselov, D, Ségransan, D, Sozzetti, A, Szentgyorgyi, A, Udry, S & Walsworth, R L 2019, ' HARPS-N Solar RVs Are Dominated by Large, Bright Magnetic Regions ', The Astrophysical Journal, vol. 874, no. 1 . https://doi.org/10.3847/1538-4357/ab064a

State-of-the-art radial-velocity (RV) exoplanet searches are currently limited by RV signals arising from stellar magnetic activity. We analyze solar observations acquired over a 3 yr period during the decline of Carrington Cycle 24 to test models of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9121ce527c2b3f924dcbafc9c92a0a8d
https://hdl.handle.net/10023/17411

Ba II 4554 Å speckle imaging as solar Doppler diagnostic

Autor: Sütterlin, P., Rutten, R.J., Skomorovsky, V.I.

Publikováno v: Astronomy & Astrophysics. Elsevier
Astronomy & Astrophysics

We present observations testing the Dopplergram capability of a narrow-band (80 mÅ) Lyot filter imaging the solar surface in the wings of the Ba II 4554 Å resonance line in combination with speckle reconstruction to obtain high angular resolution.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::81ad4b2bcc9b1e99664e71e5b192426f
https://dspace.library.uu.nl/handle/1874/1177

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